In a "Highlights" report of the National Oceanic and Atmospheric Administration's State of the Climate in 2009 document, which was prepared under the direction of the U.S. National Climatic Data Center, we can read the principal findings of what the document describes as the work of "more than 300 scientists from 48 countries." Their primary conclusion, as stated in the Report's first paragraph, is that "global warming is undeniable," and the Report goes on from there to describe "how we know the world has warmed." But this, and all that follows, tells us next to nothing about what has caused the warming, which is the crux of the whole contentious matter.

The Report next states, for example, that "recent studies show the world's oceans are heating up," which is fine; but then -- as if hoping no one will question them -- the Report says the oceans are warming, "as they absorb most of the extra heat being added to the climate system from the build-up of heat-trapping gases," which contention is far from a proven fact, and is -- in fact -- merely an hypothesis ... and a bad one at that, as we shall soon see.
Another fault of the Report is its hyping of "melting Arctic sea ice," while it remains silent on the state of Antarctic sea ice, which has been doing just the opposite as it has grown in extent. Likewise, a major inconsistency of the Report is its stating, with respect to temperature, that "a particular year can experience record-breaking highs and lows in any given location," while, "as a whole, global climate continues to warm." This is very true; and it can also do so while, as a whole, global climate cools or remains unchanged. And it implies the same thing for all types of weather phenomena (such as droughts, floods, hurricanes, etc.), which means that the occurrence of any unusually dramatic weather phenomenon in any "particular year" should imply nothing about the long-term trend of that phenomenon or the presumed trajectory of the global climate within which it is embedded. Yet the Report goes on to describe six such extreme events that occurred in the "particular year" of 2009, which would have to have been done for no other reason than to imply that these weather extremes were caused by global warming, which flies in the face of their earlier contention that record-breaking low temperatures in any year say nothing about the long-term thermal tendency of the planet.